WeakPtr destruction order cleanup: media edition.

media/cast/test/utility/in_process_receiver.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_CAST_TEST_IN_PROCESS_RECEIVER_H_
 #define MEDIA_CAST_TEST_IN_PROCESS_RECEIVER_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 83 matching lines @@
 
   const scoped_refptr<CastEnvironment> cast_environment_;
   const net::IPEndPoint local_end_point_;
   const net::IPEndPoint remote_end_point_;
   const AudioReceiverConfig audio_config_;
   const VideoReceiverConfig video_config_;
 
   scoped_ptr<transport::UdpTransport> transport_;
   scoped_ptr<CastReceiver> cast_receiver_;
 
-  // For shutdown safety, this member must be last:
+  // NOTE: This must always be last so it's invalidated before other member
+  // variables might be accessed.
   base::WeakPtrFactory<InProcessReceiver> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InProcessReceiver);
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_TEST_IN_PROCESS_RECEIVER_H_